<template>
    <div>
      <!--面包屑导航各区域-->
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
      <el-card>
        <!--添加角色按钮区域-->
        <el-row>
          <el-col>
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>
        <!--角色列表区域-->
        <el-table :data="rolelist" border stripe>
          <!--展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom','vcenter',i1===0 ? 'bdtop' : '']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!--渲染一级权限-->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--渲染二级和三权限-->
                <el-col :span="19">
                  <!--遍历二级权限-->
                  <el-row  :class="[i2===0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!--遍历三级权限-->
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                        {{item3.authName}}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <!--索引列-->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <div v-if="scope"></div>
              <el-button type='primary' icon="el-icon-edit" size="mini">编辑</el-button>
              <el-button type='danger' icon="el-icon-delete" size="mini">删除</el-button>
              <el-button type='warning' icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
        <!--分配权限-->
      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightsClosed">
        <!--树形控件-->
        <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" :default-expand-all="true"
          ref="treeRef" :default-checked-keys="defultKeys"></el-tree>
        <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
      </el-dialog>
    </div>

</template>

<script>
export default {
  name: 'roles',
  data() {
    return {
    //  所以角色数据
      rolelist: [],
      // 控制分配权限的显示和隐藏
      setRightDialogVisible: false,
    // 所有权限的数据
      rightsList: [],
      // 树形控件绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
    //  默认选中的节点Id值数组
      defultKeys: [],
      // 当前即将分配权限的id
      roleId: Number
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
  //  获取所有角色列表
    async getRolesList() {
      const {data: res} = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.rolelist = res.data
    },
    async removeRightById(role, rightId) {
    //  弹框提示用户是否要删除
      const confimResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confimResult !== 'confirm') return this.$message.info('取消了删除');
      const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      // 更新删除后内容
      role.children = res.data
    },
    // 显示分配权限的对话框
    async showSetRightDialog(role) {
      // 获取所有权限
      const {data: res} = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限失败')
      this.rightsList = res.data
      this.roleId = role.id
      // 获取三级节点的id
      this.getLeafKeys(role, this.defultKeys)
      this.setRightDialogVisible = true
    },
  //  通过递归的形式，获取角色下所有三级权限的id,并保存到defultKeys数组中
    getLeafKeys(node, arr) {
      //  如果当前node节点不包含children属性，则是三级节点
      if (!node.children) return arr.push(node.id)
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightsClosed() {
      this.defultKeys.splice(0)
    },
  //  点击为角色分配权限
    async allotRights() {
      const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
    ]
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) return this.$message.error('分配权限失败!')
      this.$message.success('分配权限成功')
      // 更新列表
      this.getRolesList()
      // 关闭弹窗
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin:7px;
}
.bdtop{
border-top:1px solid #eee;
}
.bdbottom{
  border-bottom:1px solid #eee;
  }
.vcenter{
  display: flex;
  align-items: center;
}
</style>
